Percentage Calculator
Work out percentages, increases and discounts instantly.
Use ToolCount how many days, months and years sit between any two dates, leap years included.
Enter valid values to see the result instantly.
Counting days by hand is error-prone because months have different lengths and February changes every four years. This calculator works from real calendar dates, so the day total is always exact.
It is useful for project deadlines, notice periods, visa stays, pregnancy dates and anniversaries.
There is nothing to submit or wait for — the result updates as soon as you change something.
No account, no sign-up and no daily cap — use it as often as you need.
The layout, buttons and inputs are built mobile-first and are fully keyboard accessible.
Work out percentages, increases and discounts instantly.
Use ToolFind an exact age in years, months and days.
Use ToolEstimate monthly loan instalments and total interest.
Use ToolBrowse every calculators or see the full tool list.